We can best understand how a diver is able to control his rate of rotation while in the air (and thus enter the water in a vertical position) by observing that while in the air
A) his linear momentum is constant.
B) his potential energy is constant.
C) his kinetic energy is constant.
D) his angular momentum is constant.
E) his total energy is constant.
D
You might also like to view...
The colors seen on the shiny side of a CD or DVD are due to
A. Simple reflections of light B. Colors embedded in the shiny coating C. Diffraction due to the holes in the coating D. Reflections from both surfaces of the disk.
When a ball is thrown straight up, the acceleration at its highest point is
A) upward. B) downward. C) zero. D) horizontal. E) minimum.
An ideal gas is allowed to expand adiabatically until its volume increases by 50%. By approximately what factor is the pressure reduced? (? = 5/3.)
A. 1.5 B. 2.0 C. 2.5 D. 3.0 E. 3.5
A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view
A) The dog is following the areas of increased density of the Earth. B) The dog is smelling atoms from the cat. C) The dog is smelling molecules from the cat. D) The cat is leading the dog into a trap.